.top{width: 100%;height: 90px;line-height: 90px;position: fixed;top: 0;left: 0;background-color: #fff;z-index: 30}
.logo{width: 54px;height: 73px;float: left;}
.list_nav{float: right;}
.list_nav li{float: left;}
.list_nav li a{display: block;text-decoration: none;font-size: 16px;color: #333;padding: 0 20px;}
.list_nav li a:hover{background-color: #2cab3e;color: #fff;}
.list_nav li a.on{background-color: #2cab3e;color: #fff;}